Coinbase balance
Returns account balances for exactly one portfolio. If portfolio_id is omitted, only the default portfolio is returned. Results are not aggregated across portfolios; use coinbase_portfolios_list and query each portfolio for a complete multi-portfolio view. The response portfolio_id identifies the effective portfolio queried. Balances show available funds and amounts on hold; available_balance excludes funds held by open orders. Use before trading or transferring to confirm available funds. (4 fields, 0 required)